Hi Zephyr, I agree with your comments regarding Doug Schroeder who has posted on AG and is well respected/regarded on this forum. Fyi, there is another thread comparing the Esoteric X03SE to the previous model (CD-5) which might interest you - "Esoteric X03SE vs Ayon CD-2 or CD-5".
My first cd player was the classic JVC XL-Z1050 which used a front loading version of the Victor transport paired with a Vimak DS-1800Mk2 dac. The move up to the CD-5 was revelatory! Musical, dynamic, liquid/flowing sound and bullet proof build quality. What also surprised me about the CD-5 was how it's tube preamp paddled the backside of my previous pre-amp (the preamp section of my previous Classe Cap-2100). Improved bass was the first thing I noticed, but it was clearly better in every way.
Yes I will post back in this thread with my initial impressions, then put a more considered post up once the player has done 72hours on my Isotek cd (equivalent to 250-300hrs). I will also be playing in a brand new Modwright KWA-150 amp at the same time, so it wont exactly be apples vs apples, but given the MW is essentially neutral in character, the Ayon's character should still be easily detectable. Re: the upgrade board, send me a pm for details.